Breadcrumb

 
 

Distribution pattern of Hesperodiaptomus shoshone and Leptodiaptomus coloradensis and its effects on their mating and reproductive potential

Title:

Distribution pattern of Hesperodiaptomus shoshone and Leptodiaptomus coloradensis and its effects on their mating and reproductive potential

Aguilera Salas, Maria Pia (2002) Distribution pattern of Hesperodiaptomus shoshone and Leptodiaptomus coloradensis and its effects on their mating and reproductive potential. Masters thesis, Concordia University.

[img]
Preview
PDF
2174Kb

Abstract

The main objective of this study was to describe the spatial distribution of Hesperodiaptomus shoshone (Forbes SA, 1893) and Leptodiaptomus coloradensis (Marsh, 1911). I then attempted to determine whether mating and reproductive potential (proportion of females carrying spermatophores, the proportion of females carrying clutches and the proportion of males attaching spermatophores) were affected by spatial distribution. The final goal was to determine whether there was a size difference between individuals inside and outside aggregations and a corresponding clutch size difference. Samples were taken from four ponds located at Mexican Cut, Colorado. Results indicated that H. shoshone had a patchy distribution while L. coloradensis showed a random pattern in its dispersion. Further analyses were only performed on H. shoshone . Mating potential was higher for both males and females within aggregations. However females within aggregations did not carry clutches more often than females outside aggregations. Females within aggregations were significantly larger, but no difference was observed among males and clutch size was significantly larger for females within aggregations. The distribution of H. shoshone may in part be attributed to physical processes and local pressures such as predation and food allocation. From an adaptive standpoint, their distribution patterns seem to increase the frequency of mating encounters, thereby enhancing the mating potential of individuals found within these patches.

Divisions:Concordia University > Faculty of Arts and Science > Biology
Item Type:Thesis (Masters)
Authors:Aguilera Salas, Maria Pia
Pagination:ix, 74 leaves : ill. ; 29 cm.
Institution:Concordia University
Degree Name:Theses (M.Sc.)
Program:Biology
Date:2002
Thesis Supervisor(s):Maly, Edward J.
ID Code:2100
Deposited By:Concordia University Libraries
Deposited On:27 Aug 2009 13:25
Last Modified:08 Dec 2010 10:24
Related URLs:
All items in Spectrum are protected by copyright, with all rights reserved. The use of items is governed by Spectrum's terms of access.

Repository Staff Only: item control page

Document Downloads

More statistics for this item...

Concordia University - Footer